Question
A man sells an article at a certain price incurring 20%
loss. If he had sold the same article for Rs. 20 more he would have earned 20% profit. What was the cost price of the said article?Solution
ATQ, we can say that Let the cost price of article be 100x When sold at loss SP = 100x - (20/100) × 100x = 80x When sold at profit SP = 100x + (20/100) × 100x = 120x According to the question, 120x - 80x = 20 ⇒ 40x = 20 ⇒ x = 0.5 ⇒ 100x = 50  ∴ Cost price of article is Rs. 50
289    169      121       ?      25       9
...What will come in place of the question mark (?) in the following series?
60, 110, 224, 463, ?, 1716
√(10198 )× √(7220 )÷ 16.69 + 2010.375= ?
What will come in place of the question mark (?) in the following series?
17, 138, 307, 532, ?, 1182
1     1      4       ?      280       3640
...24, 8, 15, ?, 12, 4
625, 125, 375, 75, 225, 45, ?
15, 120, 840, 5040, ?, 100800
1, 7, 25, 61, ?
13, 29, 65, 129, ?, 373
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